fd5e77f23e
Add hidpi_factor() support for retina displays. Fix Resize and MouseMoved events to handle retina displays. Fix inverted y position for MouseMoved events on mac. Fix initial painting on retina display.
116 lines
3.8 KiB
Rust
116 lines
3.8 KiB
Rust
use CreationError;
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use CreationError::OsError;
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use BuilderAttribs;
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use libc;
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use std::ptr;
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use core_foundation::base::TCFType;
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use core_foundation::string::CFString;
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use core_foundation::bundle::{CFBundleGetBundleWithIdentifier, CFBundleGetFunctionPointerForName};
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use cocoa::base::{id, nil};
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use cocoa::appkit::*;
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mod gl {
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generate_gl_bindings! {
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api: "gl",
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profile: "core",
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version: "3.2",
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generator: "global",
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extensions: ["GL_EXT_framebuffer_object"],
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}
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}
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static mut framebuffer: u32 = 0;
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static mut texture: u32 = 0;
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pub struct HeadlessContext {
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width: usize,
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height: usize,
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context: id,
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}
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impl HeadlessContext {
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pub fn new(builder: BuilderAttribs) -> Result<HeadlessContext, CreationError> {
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let (width, height) = builder.dimensions;
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let context = unsafe {
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let attributes = [
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NSOpenGLPFADoubleBuffer as usize,
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NSOpenGLPFAClosestPolicy as usize,
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NSOpenGLPFAColorSize as usize, 24,
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NSOpenGLPFAAlphaSize as usize, 8,
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NSOpenGLPFADepthSize as usize, 24,
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NSOpenGLPFAStencilSize as usize, 8,
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NSOpenGLPFAOffScreen as usize,
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0
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];
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let pixelformat = NSOpenGLPixelFormat::alloc(nil).initWithAttributes_(&attributes);
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if pixelformat == nil {
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return Err(OsError(format!("Could not create the pixel format")));
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}
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let context = NSOpenGLContext::alloc(nil).initWithFormat_shareContext_(pixelformat, nil);
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if context == nil {
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return Err(OsError(format!("Could not create the rendering context")));
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}
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context
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};
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let headless = HeadlessContext {
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width: width,
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height: height,
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context: context,
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};
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// Load the function pointers as we need them to create the FBO
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gl::load_with(|s| headless.get_proc_address(s) as *const libc::c_void);
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Ok(headless)
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}
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pub unsafe fn make_current(&self) {
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self.context.makeCurrentContext();
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gl::GenFramebuffersEXT(1, &mut framebuffer);
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gl::BindFramebufferEXT(gl::FRAMEBUFFER_EXT, framebuffer);
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gl::GenTextures(1, &mut texture);
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gl::BindTexture(gl::TEXTURE_2D, texture);
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gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MAG_FILTER, gl::LINEAR as i32);
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gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MIN_FILTER, gl::LINEAR as i32);
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gl::TexImage2D(gl::TEXTURE_2D, 0, gl::RGBA8 as i32, self.width as i32, self.height as i32,
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0, gl::RGBA, gl::UNSIGNED_BYTE, ptr::null());
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gl::FramebufferTexture2DEXT(gl::FRAMEBUFFER_EXT, gl::COLOR_ATTACHMENT0_EXT,
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gl::TEXTURE_2D, texture, 0);
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let status = gl::CheckFramebufferStatusEXT(gl::FRAMEBUFFER_EXT);
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if status != gl::FRAMEBUFFER_COMPLETE_EXT {
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panic!("Error while creating the framebuffer");
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}
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}
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pub fn get_proc_address(&self, _addr: &str) -> *const () {
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let symbol_name: CFString = from_str(_addr).unwrap();
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let framework_name: CFString = from_str("com.apple.opengl").unwrap();
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let framework = unsafe {
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CFBundleGetBundleWithIdentifier(framework_name.as_concrete_TypeRef())
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};
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let symbol = unsafe {
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CFBundleGetFunctionPointerForName(framework, symbol_name.as_concrete_TypeRef())
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};
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symbol as *const ()
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}
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pub fn get_api(&self) -> ::Api {
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::Api::OpenGl
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}
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}
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unsafe impl Send for HeadlessContext {}
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unsafe impl Sync for HeadlessContext {}
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impl Drop for HeadlessContext {
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fn drop(&mut self) {
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unsafe {
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gl::DeleteTextures(1, &texture);
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gl::DeleteFramebuffersEXT(1, &framebuffer);
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}
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}
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}
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